I was thinking of trying to sculpt a ysalamir and cast it in a gel like rubber. (Remember "Boglins", back in the 80's?) And if memory serves, the ysalamir was detatched from the Olbio using a method Thrawn learned from Mercs/Smugglers of Talon Karrde? The Back pack replaced the Olbio limb as the life support system.
I thought a cool variant, although VERY heavy would be a fish tank like pack with bubbles emitting from the bottom and the ysalamir floating in the middle with tubes and things like Weapon X, or Luke in the Bacta Tank.
One way this could be accomplished would be to use a very thin tank maybe just a centimeter or two of water for bubbles and a thin light. The rubber ysalamir suspended in a compartment on the other side of the tank, giving the illusion of being submerged.
Anyway that's just my two-cents, and my wacky brain talking. Looks like a great pack you got there!